/usr/lib/x86_64-linux-gnu/libgnutls.so.30 is in libgnutls30 3.5.8-5+deb9u4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgnutls.so.30.13.1
/usr/lib/x86_64-linux-gnu/libgnutls.so.30.13.1